LM2596T-ADJ/NOPB Description

The step-down (buck) switching regulators in the LM2596 series of regulators are monolithic integrated circuits that can drive a 3-A load with excellent line and load regulation. These devices come with 3.3 V, 5 V, 12 V fixed output voltages as well as an adjustable output version. These regulators are easy to operate, need a minimal amount of external components, and have an internal frequency compensator and fixed-frequency oscillator.

Because the LM2596 series switches at 150 kHz, fewer filter components are possible than with switching regulators that operate at lower frequencies. Available in a 5-pin TO-263 surface mount package and a regular 5-pin TO-220 packaging with a variety of lead bend options. Among many other benefits, the new product, LMR33630, has a lower BOM cost, more efficiency, and an 85% reduction in solution size. With the LMR33630, begin WEBENCH Design.

LM2596T-ADJ/NOPB Features

New product available: LMR33630 36-V, 3-A, 400-kHz synchronous converter

3.3-V, 5-V, 12-V, and adjustable output versions

Adjustable version output voltage range: 1.2-V to

37-V ±4% maximum over line and load conditions

Available in TO-220 and TO-263 packages

3-A output load current

Input voltage range up to 40 V

Requires only four external components

Excellent line and load regulation specifications

150-kHz Fixed-frequency internal oscillator

TTL shutdown capability

Low power standby mode, IQ, typically 80 μA

High efficiency

Uses readily available standard inductors

Thermal shutdown and current-limit protection

LM2596T-ADJ/NOPB Applications

Appliances

Grid infrastructure

EPOS

Home theater